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白榆是滨县优良的乡土树种,适应性强,生长迅速,用途广。当地群众对榆树的需要非常迫切,而榆树育苗长期以来采取“一播产苗”,极其粗放,播种后任其自然竟争,2—3年后拔大毛,苗木参差不齐,老少几辈,主根很大,侧根细弱,苗木尖削度大,移载后成活率很低,成活者需二年左右方能恢复正常生长。为了解决这个问题,近几年作了白榆二级育苗试验,效果很好,苗木质量大大提高,经济效益非常明显。现将白榆二级育苗技术和其效果介绍于下。
White elm is Bin County excellent native tree species, adaptability, rapid growth, wide use. The needs of the local people on the elm tree is very urgent, and elm seedlings have long been adopted, “a sowing seedlings,” extremely extensive, after sowing any of its natural competition, 2-3 years after pulling big hair, uneven seedlings, young and old generations, main root Large, thin lateral roots, seedling taper sharp, low survival rate after transfer, survivors will need about two years before they can resume normal growth. In order to solve this problem, in recent years made two elm nursery elm test, the effect is very good, seedling quality greatly improved, the economic efficiency is very obvious. Now elm nursery elm technology and its effects introduced in the next.